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Error Log Section 11-1
11-1 Error Log
Each time that an error occurs in a CJ PLC, the CPU Unit stores error infor-
mation in the Error Log Area. The error information includes the error code
(stored in A400), error contents, and time that the error occurred. Up to 20
records can be stored in the Error Log.
Errors Generated by
FAL(006)/FALS(007)
In addition to system-generated errors, the PLC records user-defined
FAL(006) and FALS(007) errors, making it easier to track the operating status
of the system.
A user-defined error is generated when FAL(006) or FALS(007) is executed in
the program. The execution conditions of these instructions constitute the
user-defined error conditions. FAL(006) generates a non-fatal error and
FALS(007) generates a fatal error that stops program execution.
The following table shows the error codes for FAL(006) and FALS(007).
Error Log Structure When more than 20 errors occur, the oldest error data (in A195 to A199) is
deleted and the newest record is stored in A100 to A104.
Instruction FAL numbers Error codes
FAL(006) #0001 to #01FF (1 to 511 decimal) 4101 to 42FF
FALS(007) #0001 to #01FF (1 to 511 decimal) C101 to C2FF
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